Number System Questions along with detailed Solutions PDF

What are Prime Numbers?

Prime numbers are integers greater than 1 that have no positive divisors other than 1 and themselves. Examples include 2, 3, 5, 7, and 11 etc.

How do I quickly check Divisibility?

Learn divisibility rules: 2 (even digits), 3 (sum of digits is divisible by 3), 4 (last two digits form a multiple of 4), 5 (ends in 0 or 5), 6 (divisible by both 2 and 3), 9 (sum of digits is divisible by 9) etc.